Congenital supra-aortic stenoses are (1) annular narrowing of the root of the ascending aorta (2) supra-aortic diaphragmatic stenosis (3) long segmental ascending aortic dysplasia. Its main lesion is aortic stenosis or occlusion of the lumen of a limited short segment of the aorta resulting in impaired aortic blood flow. The majority (more than 95%) of lesions in the constricted segment of the aorta are located in the distal part of the aortic arch at the junction with the thoracic descending aorta, i.e., the aortic isthmus, adjacent to the ductus arteriosus or the arterial ligamentous area. However, in rare cases, the narrowing segment may be located in the aortic arch, the thoracic descending aorta or even the abdominal aorta. Sometimes the aorta may be narrowed in two places. Very few patients have a family history. What are the preventive methods for congenital supra-aortic stenosis? 1. Avoid excessive physical labor and strenuous exercise, prevent infective endocarditis, and follow up and review echocardiogram regularly. 2, for hyperthyroidism combined with low potassium type periodic paralysis, patients should eat more beans, fruits, red dates, peanuts, animal offal and other foods with high potassium content, such food contains 200mg of potassium per 100g. 3, it is appropriate to eat less and more meals, 4 to 6 times a day, dishes should be light. 4.Foods with high potassium content should be used, such as beans and bean products, animal meat, poultry, eggs, vegetables, fresh and dried fruits and various fruits. 5, avoid eating high sugar and too salty diet, such as chocolate, sweet snacks, moon cakes, pickles, soy sauce melon, etc. The cause of this disease is still unclear, so there is no effective preventive measures. Since this disease is often combined with aortic valve malformation, coronary artery dilatation and abnormal opening position, right ventricular outflow tract stenosis and mitral valve lesions, a detailed preoperative examination should be performed in such patients to facilitate timely management. When removing abnormal fibrous crests or septa in the aortic wall, it is important to avoid damaging the valves and coronary arteries to prevent residual cardiac malformations and serious complications after surgery. After surgery, the circulatory status should be kept stable, blood pressure should be controlled, and bleeding from the patch site should be reduced. Stable cardiac function should be maintained to prevent arrhythmias in order to achieve good surgical results.